Double-walled container.



G. F. POTTER.

DOUBLE WALLED CONTAINER.

APPLIOATION FILED JUNE 24, 1912.

1,093,648. I Patented Apr. 21, 191 1 [:2 o'enloit' 12 12 of Fig.

UNITED STATES CHARLES E. POTTER, 0F

WOODHAVEN, NEW YORK.

DOUBLE-WALLED CONTAINER.

To all whom it may concern:

Be it known that 1, CHARLES F. POTTER, a citizen of the United States, residing in lVoodhaven, in the county of Queens and State of New York, have invented certain new and useful Improvements in Double- VValled Containers, of which the following is a specification.

The objects of my invention are to facilitate and cheapen the construction of unital, double-walled containers or vessels substantially cylindrical or prismatic in form,- these terms being used in their ordinary and limited meanings z. 6., to mean forms parallel cross-sections of which are all substantially similar and-equal, and relate especially to containers formed of pressed or drawn elements and tubular elements welded, bra zed or otherwise secured together, especially containers of considerable depth relatively to their diameter: to provide stiff, strong and smoothly-finished elements free from blemishes and tool-marks, which, when united, will make a handsome, satisfactory and durable container, and to these ends to form the tubular elements thereof integral with the discoid, polygonal or torus-shaped elements into which they merge.

The accompanying drawings show a number of variants of my invention. All the figures are axial sections of different variants except Figure 11 which is a transverse section in the line 11-11 of Fig. 2, and shows cylindrical tubular elements, and Fig. 12, which is a transverse section on the line 1'0 and shows a cylindrical outer and a polygonal (square) inner tubular element. It may be remarked that, so far as relates to the hatched portions of Figs. 10 and 12, they represent sections of any of the other figures and that Figs. 1 to 9 inclusive might be sections of vessels having either cylindrical or polygonal tubular elements, as would Fig. 10, which is specific-ally a section on line 10 -10 of Fig. 12,

, if the axial line therein were omitted.

' In the following description. the word disk means a discoidal or polygonal, ele-' ment; tube means a cylindrical or prismatic tubular element"; and torus means I a semi-torical element such as is illustrated uniting tubular elements; and welded 7" means welded, brazed or otherwise joined.

That variant of my invention which pro-- duces the/cheapest deep containers, with'al' strong and handsome, is illustrated in,

Specification of Iietters Patent.

Application filed June 24,

Patented Apr. 21, 1914. 191;. Serial No. 705,454.

4, in which, an inner member constituting an assembling unit is pressed or drawn integral, with a disk 30, tube 31 and torus 32, the outer member and assembling unit is similarly formed with a disk 33 and a short tube 34, long enough to make a rigid unit and substantially equal in diameter to the torus 32, and a supplementary tube 35 of the same diameter is welded to and unites the tube 34 and torus 32, thus forming a stron smoothly'finished, handsome container wit an air space contained within its hollow walls.

The supplementary tube 35 may be drawn seamless, rolled out of a sheet of metal, or otherwise cheaply formed, and its use enables me to draw the disk 33 and the short tube 34 integral with it, of low vrade, cheap metal, without annealing it; w ereas deep forms require fine metal and one or several annealings. This type of construction is obviously generally applicable in the manufacture of discoidal and tubular members of my container, and the cheapest mode of producing them.

Fig. 1 illustrates a variant in which the outer tube 38 is offset adjacent to the torus to form an exterior shoulder 37 useful in some cases for supporting a lid and for other purposes.

Fig. 2 illustrates the strongest vessel possible to build with perfectly smooth exterior. It is made of two integral members with a lapped joint. The simpler members, which are made without annealing of lowgrade metal, comprises the outer disk 5 and a short tube 6. The other members, which require good metal and annealing, comprises the inner. disk 1 and tube 2, the torus 3, outer tube 4, and a short oftest end tube 8 which enters and fits the tube 4 of the other member, to make the lapped joint 7.

The variant illustrated in Fig. 3 varies slightly from that shown in Fig. 2 in that the lapped joint has the appearance of a band or molding, and the weldis concealed, a short offset tube 15 being formed on and larger than the outer tube 4 of the main member, into which the tube 6 of the bottom member slips to make the lapped joint.

It is obvious that the tubes 8 and 15 of Figs. 2 and 3, respectively, might be separate hoops.

Figs. 5 and 6, illustrate variants in which i tageous and useful member (in Fig. 5) slipping into the short tube 16 of the bottom member, and Fig. 6 a variant from the above in which short tube 19 of the bottom member slips into the outer tube 18 of the main member, the weldin the first case being inconspicuous and in the second concealed, when the container is in use. v

Fig.7 illustrates a variant in which the main member is like that illustrated in Fig. 2, and the tube of the bottom member is inwardly ofiset so that when assembled the edges of said ofiset tubes meet and are welded, and a recess or concave molding is thus formed in the outer skin of the container, which, in some cases, is very advanas a seat in which to secure the strap of a handle oryoke-by means of which the container and its contents can be lifted and transpgrted. I i

Figs. 8 and 9 illustrate variantsin which the members have reversely-curved and located tori at their meeting edges, which, when assembled, give the appearance of half-round or ogee moldings, and conceal the weld, are handsome and make places for attaching a yoke or handle for lifting and transporting the containers and their contents. In the variant of Fig. 8, the exterior, outwardly-convex, extended torus 20 is formed on the bottom interior, outwardly-concave, inset torus 22 on the main member, while in that of Fig. 9

these locations of the complementary tori.

are reversed, the extended torus 24 being on the mam, and the inset torus 23 on the bottom member; and the members are assembled by' slipping or springing the edges of the tori one into the other and welding them together.

I may provide suitable covers, 10, as shown in Fig. 2, for my containers, with knobs or handles to lift them by and tubular and annular flanges to properly retain them 1n position; and I may provide small containers with handles 9 as shown in Fig. 2.

It will be notedthat the hollow walls of my container and the contained air space insulate their inner members and adapt them so if or use as receptacles for substances which it is desirable to preserve at a uniform temperature and that hot substances will remain hot and cold substances cold for long periods when stored in them. Further, the

member, and the variants in which a convex or concave annulus is formed in the outer tube, by which a yoke or double-ended handle can be socurely attached, are peculiarly suited for. hand ladles for the transportation of melted metal in foundries and elsewhere, because they are light, strong and do not conduct heat rapidly. Where my containers may be subjected to great variations of temperature, which would cause undue expansion of the air contained in the air-space within its hollow walls, I may perforate their outer walls, so that said heated air will not strain or burst them. My containers are also admirably" adapted for use as double boilers, for rice, oatmeal and similar foods, and for the baking and roasting bread, cake, meat and other foods, which can be cooked in them without danger ofbeing scorched; but their most important use is for hand ladles in foundries It would obviously be within the scope of 'my invention to flatten the torus, 32, into a ring with short tubular inner and outer walls united by a flat annulus; but such a shape would be more difficult to make and less sightly.

Having thus described my invention, I claim:

1. A double walled container comprising merging inner discoid and tubular elements and a torus, an outer tubular element united to said torus, merging outer discoid and tubular elements and a concavo-convex circumferential element formed on oneof said outer tubular elements and adapted to form a molding on the assembled container, said outer tubular members being welded together.

2, A. double-walled container comprising merging inner discoid and tubular elements and a torus, an outer tubular element united to said torus, merging outer discoid and 'tubular elements and complementary concavo-convex circumferential elements formed on said outer tubular elements, and adapted to form concavo-convex molding on the assembled container, said outer tubular members being welded together.

CHARLES 13. POTTER. Witnesses:

FRED J. DOLE, JOHN M ORRIS. 

